70 ILCS 835/4
For the purpose of making capital improvements in connection with a zoological park established under this Act, the corporate authorities of the forest preserve district in which such park is maintained may incur an indebtedness and issue bonds therefor in amounts not exceeding in the aggregate $15,640,000. Such bonds shall bear interest at a rate of not more than the maximum rate authorized by the Bond Authorization Act, as amended at the time of the making of the contract, if issued prior to January 1, 1972, and at the rate of not more than the maximum rate authorized by the Bond Authorization Act, as amended at the time of the making of the contract, if issued after January 1, 1972, per annum and shall mature within 20 years from the date thereof. The resolution authorizing this issuance of bonds may be made effective without the submission thereof to the voters of the district for approval.
All moneys received from the issuance of bonds as provided in this Section shall be set apart in a separate fund by the district treasurer and shall be used only for the purposes set forth in this Section.
The corporate authorities of such district shall provide for the levy of a direct annual tax upon all the taxable property in such district, sufficient to pay and discharge the principal of such bonds at maturity and to pay the interest thereon as it falls due. This tax shall be levied and collected in like manner with the general taxes of the forest preserve district and shall be in addition to the maximum of all other taxes and tax rates which the district is or may be authorized to levy.
With respect to instruments for the payment of money issued under this Section either before, on, or after the effective date of this amendatory Act of 1989, it is and always has been the intention of the General Assembly (i) that the Omnibus Bond Acts are and always have been supplementary grants of power to issue instruments in accordance with the Omnibus Bond Acts, regardless of any provision of this Act that may appear to be or to have been more restrictive than those Acts, (ii) that the provisions of this Section are not a limitation on the supplementary authority granted by the Omnibus Bond Acts, and (iii) that instruments issued under this Section within the supplementary authority granted by the Omnibus Bond Acts are not invalid because of any provision of this Act that may appear to be or to have been more restrictive than those Acts.
70 ILCS 835/4